1. Die zentrische Zerlegung der regulären Polytope;Barrau;Nieuw Archief voor Wiskunde,1906
2. Triangles with vertices on lattice points;Beeson;Amer. Math. Monthly,1992
3. Polygon imbedded in a lattice;Chrestenson;Amer. Math. Monthly,1963
4. Regular Polytopes;Coxeter,1973
5. Regular compound polytopes in more than four dimensions;Coxeter;J. Math. and Physics,1933